John Gill Commentary Isaiah 22:20

"And it shall come to pass in that day, that I will call my servant Eliakim the son of Hilkiah:" — Isaiah 22:20 (ASV)

And it shall come to pass in that day
At the same time that Shebna was deposed from his high station:

that I will call my servant Eliakim, the son of Hilkiah ;
whom Kimchi thinks was the same with Azariah the son of Hilkiah, who might have two names, and was a ruler over the house of God in the times of Hezekiah, (1 Chronicles 6:13) (2 Chronicles 31:13) this man, by the character given him, was a good man, a faithful, diligent, and constant servant of the Lord, and therefore he delighted to raise him to great honour and dignity: he did not seek great things for himself, nor did he thrust himself into the office, but the Lord called him to it in his providence, and put him into it; he did, as Kimchi observes, put it into the heart of Hezekiah to appoint him governor in the room of Shebna.

This man was a type of Christ; his name agrees with him which signifies, "my God will raise up"; that is, the dead by him, (1 Corinthians 6:14) and so does the character of a servant, frequently given to Christ in this book; see (Isaiah 42:1) (49:3) (53:11) nor did Christ take any office to himself, but was called unto it by his Father, (Hebrews 5:4Hebrews 5:5) .